Hoping someone knows the correct answer as I can't find any information on this apparently new style oil injector and jet.

This injector is supplied with a small rubber grommet the has a molded in washer on one side and is concave on the other. Both surfaces have molded in o-rings for sealing and it fits on top of the oil jet, as shown. Note that the oil jets are flat on top and do not the screw driver slot I'm familiar with.

So which way does the grommet go in?

 

Can't help you with that, but let me know when you're ready to put the motor in.

 

Nobody knows the answer to this? I know that there is no shortage of ideas, theory or opinion on this board....

So if I had to quess, I would say that the funnel side goes up toward the so called injector bolt. I *think* that the purpose of this grommet is to prevent pooling of oil above the jet, as is possible with earlier designs.

A jspec or Efini part maybe?

 

The gromet fills the gap caused by a jet design change in the new rotor housings. As for which direction they point I'm not sure. After going to the garage and looking closely at an injector and the gromet I feel the funel should point down into the engine and this is why. The sealing surface on the injector end is small, slightly tapered and treaded. The better fit would be the gromet side that has the small protruding ring and the metal shows. I don't have a newer style rotor housing as a reference, but I do remember seeing a picture showing the jet. It was flat and smooth on the top with a wider surface that isn't threaded. I believe these are pressed in.

 

Hey man, is one side a tan hard shell and the other a black rubber? If so, the black rubber portion will face YOU once it is inserted

Trev

 

OHHHHHHHHHH man i finished rebuilding my motor yesterday and that thing with the injector grommet is the last one left.I was about to make a thread regarding this when i saw yours!!!here are some pics :

So which way does the grommet go in?

 

We just finished my rebuild as well and I'm missing one of my rubberized spacers/grommet things. Anybody have an extra one I can buy?? Freakin' Mazda only sells them with new housings!

Anybody know what would happen if I just not use these at all?

 

Not true, I got two in my rebuild gasket kit. Of course for the price you might as well get a new housing!! Seeing they are only used with new housings someone must have them laying around. Good luck!

 

I left these out for a couple reasons.

1. The motor didn't have them before, no signs of oil starvation. If it ain't broke don't fix it.

2. I measure the hole depth and the thinkness of said rubber piece and on my housings the things had to compress a few mm's and I wasn't sure what that would do to the orifice size with it compressed.

3. I have a really simple single turbo setup so if I get a good reason to put them in it will only take about an hour to get them in and put it all back together.

That also being said I did a number of searches (google, rx7club, nospistons) and couldn't find any info.

Maybe I'll call Mazda Motorsports on Monday and see what they have to say.

 

Attached is an excerpt I found in an article regarding the new style injectors. BTW, Pandaz, these grommets were packaged with the injectors.

 

They should go with the metal side down and the cone shape upward. The top side seals against the oil injector.

 

Really? Cause' I just bought new oil injectors from Ray at Malloy and they did not come with the little grommets unfortunitly... and Ray verified that the grommet only came with the new housings and that a lot of people call for them and he does not have a part # for them.

Again, I lost one of mine when I bought my new housings, if anyone has an extra one I will gladly buy it. (maybe someone who pre-mixes only??)

 

No where did you pull that out of might I ask? I think that with the slot in screwed in part of the housing and the flat surface of the injector that the flat metal part would go up and the part with rubber would face down to help seal that uneven surface, but that is just a guess.

So are you just guessing or do you have some actual factory guidance on these things?

 

Might be more than just a trifle late, but having lost some recently off the housing packaging....

Mazda do list them as a separate item......most likely not in North America and probably Australia either!

#N3G1-14-634

They also come in the S8 "o" ring and the complete gasket set.

As for this....

answered here...

You're left to your own devices with old housings I think.